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Course: Igcse Physics
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Igcse Physics

1. Motion, Forces and Energy

0/161 Dr Dabour Hub Science Diagram and Course Material

2. Thermal Physics

0/75 Dr Dabour Hub Science Diagram and Course Material

3. Waves

0/77 Dr Dabour Hub Science Diagram and Course Material

4. Electricity and Magnetism

0/119 Dr Dabour Hub Science Diagram and Course Material

5. Nuclear Physics

0/39 Dr Dabour Hub Science Diagram and Course Material

6. Space Physics

0/47 Dr Dabour Hub Science Diagram and Course Material
Quiz

4.2.2 Demonstrating Electric Charges – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The leaf of a charged electroscope rises because
the cap attracts the leaf
the leaf is heavier
the leaf and stem have the same charge and repel
gravity weakens
2.
Touching the cap of a charged electroscope with a finger makes the leaf fall because
the leaf gains protons
charge flows to earth
the finger is neutral so it attracts the leaf
the case absorbs charge
3.
A negative rod is held near (not touching) the cap of a neutral electroscope. The leaf
rises and the cap is positive
does not move
falls
rises and the cap is negative
4.
After induction using a negative rod and a brief earth connection, the electroscope is
negative
neutral
charged with protons only
positive
5.
A positive electroscope's leaf rises further when an object is brought close. The object is
negative
neutral
positive
an insulator
6.
Why is a dry day best for static experiments?
Dry air is a conductor
Humid air conducts charge away
Rubbing is easier in wet air
Electrons cannot move in dry air
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Part of 4. Electricity and Magnetism — see every lesson and quiz in this unit.
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